<?php

/**
  +------------------------------------------------------------------------------
 * 分类管理
  +------------------------------------------------------------------------------
 */
 namespace Org\Util;
 class Category {

     private $model;                                                           //分类的数据表模型
     private $rawList = array();                                              //原始的分类数据
     private $formatList = array();                                           //格式化后的分类
     private $error = "";                                                      //错误信息
     private $icon = array('&nbsp;&nbsp;│', '&nbsp;&nbsp;├ ', '&nbsp;&nbsp;└ ');  //格式化的字符
     private $fields = array();                                               //字段映射，分类id，上级分类fid,分类名称name,格式化后分类名称fullname

     /**
     +----------------------------------------------------------
      * 构造函数，对象初始化
     +----------------------------------------------------------
      * @param array,object  $model      数组或对象，基于TP3.0的数据表模型名称,若不采用TP，可传递空值。
      * @param array         $field      字段映射，分类cid，上级分类fid,分类名称,格式化后分类名称fullname
     +----------------------------------------------------------
      */

     public function __construct($model = '', $fields = array(),$condition='',$orderby='') {
         if (is_string($model) && (!empty($model))) {
             if (!$this->model = D($model))
                 $this->error = $model . "模型不存在！";
         }
         if (is_object($model))
              $this->model = &$model;
         $this->condition=$condition;
         $this->orderby = $orderby;
         $this->fields['cid'] = $fields['0'] ? $fields['0'] : 'cid';
         $this->fields['fid'] = $fields['1'] ? $fields['1'] : 'fid';
         $this->fields['name'] = $fields['2'] ? $fields['2'] : 'name';
         $this->fields['fullname'] = $fields['3'] ? $fields['3'] : 'fullname';
     }

     /**
     +----------------------------------------------------------
      * 获取分类信息数据
     +----------------------------------------------------------
      * @param array,string  $condition  查询条件
      * @param string        $orderby    排序
     +----------------------------------------------------------
      */
     private function _findAllCat($condition, $orderby = NULL) {     	
         $this->rawList = empty($orderby) ? $this->model->where($condition)->select() : $this->model->where($condition)->order($orderby)->select();
     }

     /**
     +----------------------------------------------------------
      * 返回给定上级分类$fid的所有同一级子分类
     +----------------------------------------------------------
      * @param   int     $fid    传入要查询的fid
     +----------------------------------------------------------
      * @return  array           返回结构信息
     +----------------------------------------------------------
      */
     public function getChild($fid) {
         $childs = array();
         foreach ($this->rawList as $Category) {
             if ($Category[$this->fields['fid']] == $fid)
                 $childs[] = $Category;
         }
         return $childs;
     }

     /**
     +----------------------------------------------------------
      * 递归格式化分类前的字符
     +----------------------------------------------------------
      * @param   int     $cid    分类cid
      * @param   string  $space
     +----------------------------------------------------------
      */
     private function _searchList($cid = 0, $space = "") {
         $childs = $this->getChild($cid);
         //下级分类的数组
         //如果没下级分类，结束递归
         if (!($n = count($childs)))
             return;
         $m = 1;
         //循环所有的下级分类
         for ($i = 0; $i < $n; $i++) {
             $pre = "";
             $pad = "";
             if ($n == $m) {
                 $pre = $this->icon[2];
             } else {
                 $pre = $this->icon[1];
                 $pad = $space ? $this->icon[0] : "";
             }
             $childs[$i][$this->fields['fullname']] = ($space ? $space . $pre : "") . $childs[$i][$this->fields['name']];
             $this->formatList[] = $childs[$i];
             $this->_searchList($childs[$i][$this->fields['cid']], $space . $pad . "&nbsp;&nbsp;"); //递归下一级分类
             $m++;
         }
     }

     /**
     +----------------------------------------------------------
      * 不采用数据模型时，可以从外部传递数据，得到递归格式化分类
     +----------------------------------------------------------
      * @param   array,string     $condition    条件
      * @param   int              $cid          起始分类
      * @param   string           $orderby      排序
     +----------------------------------------------------------
      * @return  array           返回结构信息
     +----------------------------------------------------------
      */
     public function getList($condition = NULL, $cid = 0, $orderby = NULL) {
         unset($this->rawList, $this->formatList);
         if(!$condition) {
             $condition = $this->condition;
         }
         $orderby = $this->orderby;
         $this->_findAllCat($condition, $orderby);
         $this->_searchList($cid);
         return $this->formatList;
     }

     /**
     +----------------------------------------------------------
      * 获取结构
     +----------------------------------------------------------
      * @param   array            $data         二维数组数据
      * @param   int              $cid          起始分类
     +----------------------------------------------------------
      * @return  array           递归格式化分类数组
     +----------------------------------------------------------
      */
     public function getTree($data, $cid = 0) {
         unset($this->rawList, $this->formatList);
         $this->rawList = $data;
         $this->_searchList($cid);
         return $this->formatList;
     }

     /**
     +----------------------------------------------------------
      * 获取错误信息
     +----------------------------------------------------------
      * @return  string           错误信息字符串
     +----------------------------------------------------------
      */
     public function getError() {
         return $this->error;
     }

     /**
     +----------------------------------------------------------
      * 检查分类参数$cid,是否为空
     +----------------------------------------------------------
      * @param   int              $cid          起始分类
     +----------------------------------------------------------
      * @return  boolean           递归格式化分类数组
     +----------------------------------------------------------
      */
     private function _checkCatID($cid) {
         if (intval($cid)) {
             return true;
         } else {
             $this->error = "参数分类ID为空或者无效！";
             return false;
         }
     }

     /**
     +----------------------------------------------------------
      * 检查分类参数$cid,是否为空
     +----------------------------------------------------------
      * @param   int         $cid        分类cid
     +----------------------------------------------------------
      */
     private function _searchPath($cid) {
         //检查参数
         if (!$this->_checkCatID($cid))
             return false;
         $rs = $this->model->find($cid);                                        //初始化对象，查找上级Id；
         $this->formatList[] = $rs;                                            //保存结果
         $this->_searchPath($rs[$this->fields['fid']]);
     }

     /**
     +----------------------------------------------------------
      * 查询给定分类cid的路径
     +----------------------------------------------------------
      * @param   int         $cid        分类cid
     +----------------------------------------------------------
      * @return  array                   数组
     +----------------------------------------------------------
      */
     public function getPath($cid) {
         unset($this->rawList, $this->formatList);
         $this->_searchPath($cid);                                               //查询分类路径
         return array_reverse($this->formatList);
     }

     /**
     +----------------------------------------------------------
      * 添加分类
     +----------------------------------------------------------
      * @param   array         $data        一维数组，要添加的数据，$data需要包含上级分类ID。
     +----------------------------------------------------------
      * @return  boolean                    添加成功，返回相应的分类ID,添加失败，返回FALSE；
     +----------------------------------------------------------
      */
     public function add($data) {
         if (empty($data))
             return false;
         return $this->model->data($data)->add();
     }

     /**
     +----------------------------------------------------------
      * 修改分类
     +----------------------------------------------------------
      * @param   array         $data     一维数组，$data需要包含要修改的分类cid。
     +----------------------------------------------------------
      * @return  boolean                 组修改成功，返回相应的分类ID,修改失败，返回FALSE；
     +----------------------------------------------------------
      */
     public function edit($data) {
         if (empty($data))
             return false;
         return $this->model->data($data)->save();
     }

     /**
     +----------------------------------------------------------
      * 删除分类
     +----------------------------------------------------------
      * @param   int         $cid        分类cid
     +----------------------------------------------------------
      * @return  boolean                 删除成功，返回相应的分类ID,删除失败，返回FALSE
     +----------------------------------------------------------
      */
     public function del($cid) {
         $cid = intval($cid);
         if (empty($cid))
             return false;
         $conditon[$this->fields['cid']] = $cid;
         return $this->model->where($conditon)->delete();
     }

 }
?>